If you organise a conference, then arrange flights and accommodations for +1s be they independent adults, dependents of any kind, family dog, company director,

If you organise a conference, then arrange flights and accommodations for +1s be they independent adults, dependents of any kind, family dog, company director, servant or journalist, you better have options for that +1 that include allowing them access to the venue for the period that your invited speaker is expected to be there. Something as simple as am "Invited Guest" pass, to indicate that this person is allowed to the coffee shop, merchandise store and toilets unaccompanied, is the least you can do. It doesn't matter who invited them, just give them the Amulet of Warding From Security Drones. Job done. Then when arranging insurance for the event, make sure you account for expected people +30% to allow for "Invited Guests" brought along by the organisers, stage hands, support technicians, attendees and the CEO of the company running the show who decided on the spur of the moment to drag a retinue of golf friends around the event to show off. It is not rocket surgery!